refactor: remove sysout

app/src/main/java/common/ConsumerSignal.java

@@ -0,0 +1,27 @@
+package common;
+
+import java.util.HashSet;
+import java.util.Set;
+import java.util.function.Consumer;
+
+public class ConsumerSignal<T> {
+	private final Set<Consumer<T>> listeners;
+
+	public ConsumerSignal() {
+		this.listeners = new HashSet<>();
+	}
+
+	public void connect(Consumer<T> listener) {
+		this.listeners.add(listener);
+	}
+
+	public void clear() {
+		this.listeners.clear();
+	}
+
+	public void emit(T arg) {
+		for (Consumer<T> listener : this.listeners) {
+			listener.accept(arg);
+		}
+	}
+}

app/src/main/java/game/Game.java

@@ -1,6 +1,10 @@
 package game;
 
+import java.time.Instant;
+import java.util.ArrayList;
+import java.util.Collections;
 import java.util.HashMap;
+import java.util.List;
 import java.util.Map;
 
 import sudoku.structure.MultiDoku;
@@ -11,12 +15,17 @@ public class Game {
 		GameNotStarted, GameGoing, GameEnd
 	}
 
+	public static final int GAME_DURATION = 10 * 60;
+
 	private final Map<Integer, Player> players;
+	private final List<Player> leaderboard;
 	private GameState gameState;
 	private MultiDoku doku;
+	private Instant startTime = null;
 
 	public Game() {
 		this.players = new HashMap<>();
+		this.leaderboard = new ArrayList<>();
 		this.gameState = GameState.GameNotStarted;
 	}
 
@@ -26,19 +35,28 @@ public class Game {
 
 	public void addPlayer(Player player) {
 		players.put(player.getId(), player);
+		leaderboard.add(player);
+	}
+
+	public void setPlayerScore(Player player, int newScore) {
+		player.setScore(newScore);
+		Collections.sort(this.leaderboard,
+				(player1, player2) -> Integer.compare(player1.getScore(), player2.getScore()));
 	}
 
 	public void removePlayer(int id) {
-		players.remove(id);
+		this.leaderboard.remove(getPlayerById(id));
+		this.players.remove(id);
 	}
 
 	public Map<Integer, Player> getPlayers() {
 		return players;
 	}
 
-	public void startGame(MultiDoku doku) {
+	public void startGame(MultiDoku doku, Instant startTime) {
 		this.doku = doku;
 		this.gameState = GameState.GameGoing;
+		this.startTime = startTime;
 	}
 
 	public GameState getGameState() {
@@ -49,4 +67,12 @@ public class Game {
 		return doku;
 	}
 
+	public List<Player> getLeaderboard() {
+		return leaderboard;
+	}
+
+	public Instant getStartTime() {
+		return startTime;
+	}
+
 }

app/src/main/java/game/Player.java

@@ -8,10 +8,20 @@ public class Player implements Serializable {
 
 	private final String pseudo;
 	private final int id;
+	private int score;
 
 	public Player(int id, String pseudo) {
 		this.pseudo = pseudo;
 		this.id = id;
+		this.score = 0;
+	}
+
+	public int getScore() {
+		return score;
+	}
+
+	void setScore(int score) {
+		this.score = score;
 	}
 
 	public String getPseudo() {

app/src/main/java/gui/menu/MultiPlayerDokuView.java

@@ -1,22 +1,38 @@
 package gui.menu;
 
-import gui.SudokuRenderer;
+import game.Game;
+import gui.widget.LeaderboardRenderer;
+import gui.widget.MultiPlayerCompleteProgress;
+import gui.widget.SudokuRenderer;
+import gui.widget.TimerRenderer;
 import imgui.ImGui;
 import network.client.Client;
 import network.server.Server;
+import sudoku.structure.Cell;
 
 public class MultiPlayerDokuView extends BaseView {
 
 	private final Client client;
 	private final Server server;
 	private final SudokuRenderer sudokuRenderer;
+	private final LeaderboardRenderer leaderboardRenderer;
+	private final TimerRenderer timerRenderer;
+	private final MultiPlayerCompleteProgress completeProgress;
 
 	public MultiPlayerDokuView(StateMachine stateMachine, Client client, Server server) {
 		super(stateMachine);
 		this.client = client;
 		this.server = server;
 		this.sudokuRenderer = new SudokuRenderer(this.client.getGame().getDoku());
+		this.leaderboardRenderer = new LeaderboardRenderer(client.getGame(), client.getPlayer());
+		this.sudokuRenderer.onCellChange.connect(this::onCellChange);
 		this.client.onDisconnect.connect(this::onDisconnect);
+		this.timerRenderer = new TimerRenderer(this.client.getGame().getStartTime(), Game.GAME_DURATION);
+		this.completeProgress = new MultiPlayerCompleteProgress(this.client.getGame());
+	}
+
+	private void onCellChange(Cell cell) {
+		this.client.sendCellChange(cell);
 	}
 
 	public void onDisconnect() {
@@ -27,6 +43,9 @@ public class MultiPlayerDokuView extends BaseView{
 
 	@Override
 	public void render() {
+		this.timerRenderer.render();
+		this.leaderboardRenderer.render();
+		this.completeProgress.render();
 		this.sudokuRenderer.render();
 		if (ImGui.button("Quitter")) {
 			this.client.stop();

app/src/main/java/gui/menu/MultiPlayerView.java

@@ -1,24 +1,27 @@
 package gui.menu;
 
-import java.util.Arrays;
-
 import game.Player;
+import gui.widget.SudokuSelector;
 import imgui.ImGui;
 import network.client.Client;
 import network.server.Server;
-import sudoku.constraint.Constraint;
 import sudoku.structure.MultiDoku;
-import sudoku.structure.SudokuFactory;
 
 public class MultiPlayerView extends BaseView {
 
 	private final Client client;
 	private final Server server;
 
+	private final SudokuSelector selector;
+
+	private MultiDoku doku = null;
+
 	public MultiPlayerView(StateMachine stateMachine, Client client, Server server) {
 		super(stateMachine);
 		this.client = client;
 		this.server = server;
+		this.selector = new SudokuSelector(false, "Sélectionner le sudoku");
+		this.selector.onSelect.connect(this::onSelected);
 		this.client.onDisconnect.connect(this::onDisconnect);
 		this.client.onGameStarted
 				.connect(() -> this.stateMachine.pushState(new MultiPlayerDokuView(stateMachine, client, server)));
@@ -34,15 +37,22 @@ public class MultiPlayerView extends BaseView {
 		this.stateMachine.popState();
 	}
 
+	private void onSelected(MultiDoku doku) {
+		this.doku = doku;
+	}
+
 	public void renderGameStatus() {
 		if (this.server == null) {
 			ImGui.text("En attente de l'administrateur du serveur ...");
 		} else {
+			if (this.doku == null)
+				ImGui.beginDisabled();
 			if (ImGui.button("Démarrer")) {
-				// temp
-				MultiDoku doku = SudokuFactory.createBasicXShapedMultidoku(3, Arrays.asList(Constraint.Diagonal));
-				this.server.startGame(doku);
+				this.server.startGame(this.doku);
 			}
+			if (this.doku == null)
+				ImGui.endDisabled();
+			selector.render();
 		}
 	}
 

app/src/main/java/gui/menu/SoloMenu.java

@@ -1,7 +1,8 @@
 package gui.menu;
 
-import gui.SudokuSelector;
+import gui.widget.SudokuSelector;
 import imgui.ImGui;
+import sudoku.structure.MultiDoku;
 
 public class SoloMenu extends BaseView {
 
@@ -9,12 +10,12 @@ public class SoloMenu extends BaseView {
 
 	public SoloMenu(StateMachine stateMachine) {
 		super(stateMachine);
-		this.sudokuSelector = new SudokuSelector(true);
+		this.sudokuSelector = new SudokuSelector(true, "Résoudre le sudoku");
 		this.sudokuSelector.onSelect.connect(this::pushSudokuState);
 	}
 
-	private void pushSudokuState() {
-		this.stateMachine.pushState(new SudokuView(stateMachine, this.sudokuSelector.getDoku()));
+	private void pushSudokuState(MultiDoku doku) {
+		this.stateMachine.pushState(new SudokuView(stateMachine, doku));
 	}
 
 	@Override

app/src/main/java/gui/menu/SudokuView.java

@@ -2,7 +2,7 @@ package gui.menu;
 
 import java.util.concurrent.CancellationException;
 
-import gui.SudokuRenderer;
+import gui.widget.SudokuRenderer;
 import imgui.ImGui;
 import imgui.ImGuiStyle;
 import sudoku.io.SudokuSerializer;

app/src/main/java/gui/widget/LeaderboardRenderer.java

@@ -0,0 +1,70 @@
+package gui.widget;
+
+import game.Game;
+import game.Player;
+import imgui.ImGui;
+import imgui.ImVec2;
+import imgui.ImVec4;
+import imgui.flag.ImGuiCol;
+import imgui.flag.ImGuiStyleVar;
+
+public class LeaderboardRenderer {
+
+	private final Game game;
+	private final Player currentPlayer;
+
+	private final float cellHeight = 75;
+	private final ImVec2 cellSize = new ImVec2(12 * cellHeight, cellHeight);
+	private final ImVec2 rankSize = new ImVec2(cellHeight, cellHeight);
+	private final ImVec2 scoreSize = rankSize;
+	private final ImVec2 nameSize = new ImVec2(cellSize.x - cellHeight * 2.0f, cellHeight);
+	private final ImVec4 cellColorPlayer = new ImVec4(0.20f, 0.67f, 1.0f, 0.5f);
+	private final ImVec4 cellColorEnemy = new ImVec4(1.0f, 0.0f, 0.0f, 0.5f);
+	private final int maxPlayersShowed = 2;
+
+	public LeaderboardRenderer(Game game, Player player) {
+		this.game = game;
+		this.currentPlayer = player;
+	}
+
+	private void renderRank(int rank) {
+		ImGui.button(Integer.toString(rank), rankSize);
+	}
+
+	private void renderName(String name) {
+		ImGui.button(name, nameSize);
+	}
+
+	private void renderScore(int score) {
+		ImGui.button(Integer.toString(score), scoreSize);
+	}
+
+	private void renderCell(Player player, int rank, ImVec4 color) {
+		ImGui.pushStyleColor(ImGuiCol.Button, color);
+		ImGui.pushStyleColor(ImGuiCol.ButtonHovered, color);
+		ImGui.pushStyleColor(ImGuiCol.ButtonActive, color);
+		ImGui.beginChild(player.getPseudo() + "##" + player.getId(), cellSize);
+		renderRank(rank);
+		ImGui.sameLine();
+		renderName(player.getPseudo());
+		ImGui.sameLine();
+		renderScore(player.getScore());
+		ImGui.endChild();
+		ImGui.popStyleColor(3);
+	}
+
+	public void render() {
+		var displaySize = ImGui.getIO().getDisplaySize();
+		ImGui.setCursorPosX(displaySize.x / 2.0f - cellSize.x / 2.0f);
+		ImGui.beginChild("Leaderboard", new ImVec2(cellSize.x + 15.0f, cellHeight * maxPlayersShowed));
+		ImGui.pushStyleVar(ImGuiStyleVar.ItemSpacing, new ImVec2());
+		ImGui.pushStyleVar(ImGuiStyleVar.FrameBorderSize, 3.0f);
+		for (int i = 0; i < game.getLeaderboard().size(); i++) {
+			Player player = game.getLeaderboard().get(i);
+			renderCell(player, i + 1, player == currentPlayer ? cellColorPlayer : cellColorEnemy);
+		}
+		ImGui.popStyleVar(2);
+		ImGui.endChild();
+	}
+
+}

app/src/main/java/gui/widget/MultiPlayerCompleteProgress.java

@@ -0,0 +1,28 @@
+package gui.widget;
+
+import game.Game;
+import game.Player;
+import imgui.ImGui;
+import imgui.ImVec2;
+
+public class MultiPlayerCompleteProgress {
+
+	private final Game game;
+	private final int emptyCellCount;
+	private final ImVec2 progressSize = new ImVec2(700, 50);
+	private final SmoothProgressBar progressBar;
+
+	public MultiPlayerCompleteProgress(Game game) {
+		this.game = game;
+		this.emptyCellCount = game.getDoku().getEmptyCells().size();
+		this.progressBar = new SmoothProgressBar();
+	}
+
+	public void render() {
+		Player firstPlayer = game.getLeaderboard().get(0);
+		ImGui.setCursorPosX(ImGui.getIO().getDisplaySizeX() / 2.0f - progressSize.x / 2.0f);
+		String progressText = firstPlayer.getPseudo() + " - " + firstPlayer.getScore() + "/" + emptyCellCount;
+		this.progressBar.render(progressText, progressSize, 1.0f - firstPlayer.getScore() / (float) emptyCellCount);
+	}
+
+}

app/src/main/java/gui/widget/SmoothProgressBar.java

@@ -0,0 +1,21 @@
+package gui.widget;
+
+import imgui.ImGui;
+import imgui.ImVec2;
+
+public class SmoothProgressBar {
+
+	private float lastProgress = 0;
+	private final float speed = 2.0f;
+	private final float clipConstant = 0.001f;
+
+	public void render(String label, ImVec2 size, float progress) {
+		float delta = progress - lastProgress;
+		if (Math.abs(delta) < clipConstant)
+			lastProgress = progress;
+		else
+			lastProgress = lastProgress + delta * ImGui.getIO().getDeltaTime() * speed;
+		ImGui.progressBar(lastProgress, size, label);
+	}
+
+}

app/src/main/java/gui/widget/SudokuRenderer.java

@@ -1,4 +1,4 @@
-package gui;
+package gui.widget;
 
 import java.util.HashMap;
 import java.util.HashSet;
@@ -6,7 +6,13 @@ import java.util.List;
 import java.util.Map;
 import java.util.Set;
 
+import common.ConsumerSignal;
 import common.Signal;
+import gui.ColorGenerator;
+import gui.Fonts;
+import gui.Options;
+import gui.RenderableMultidoku;
+import gui.Symbols;
 import gui.ColorGenerator.Color;
 import imgui.ImGui;
 import imgui.ImVec2;
@@ -33,6 +39,7 @@ public class SudokuRenderer {
 	private final Set<Cell> diagonals = new HashSet<>();
 
 	public final Signal onResolve = new Signal();
+	public final ConsumerSignal<Cell> onCellChange = new ConsumerSignal<>();
 
 	public SudokuRenderer(MultiDoku doku) {
 		this.doku = RenderableMultidoku.fromMultidoku(doku);
@@ -72,11 +79,13 @@ public class SudokuRenderer {
 				if (currentCell.getSymbolIndex() == i) {
 					if (ImGui.button("X", cellSize)) {
 						currentCell.setSymbolIndex(Cell.NOSYMBOL);
+						this.onCellChange.emit(currentCell);
 						ImGui.closeCurrentPopup();
 					}
 				} else {
 					if (ImGui.button(Options.Symboles.getSymbols().get(i), cellSize)) {
-						currentCell.trySetValue(i);
+						if (currentCell.trySetValue(i))
+							this.onCellChange.emit(currentCell);
 						if (this.doku.getDoku().isSolved())
 							this.onResolve.emit();
 						ImGui.closeCurrentPopup();
@@ -98,7 +107,7 @@ public class SudokuRenderer {
 		if (offsetX > 0) {
 			ImGui.setCursorPosX(offsetX);
 		}
-		ImGui.beginChild(1, new ImVec2(cellSize.x * doku.getWidth(), cellSize.y * doku.getHeight()));
+		ImGui.beginChild("sudokuChild", new ImVec2(cellSize.x * doku.getWidth(), cellSize.y * doku.getHeight()));
 
 		ImGui.pushStyleVar(ImGuiStyleVar.FrameBorderSize, 2.0f);
 		ImGui.pushStyleVar(ImGuiStyleVar.ItemSpacing, new ImVec2(0.0f, 0.0f));

app/src/main/java/gui/widget/SudokuSelector.java

@@ -1,9 +1,10 @@
-package gui;
+package gui.widget;
 
 import java.util.ArrayList;
 import java.util.List;
 
-import common.Signal;
+import common.ConsumerSignal;
+import gui.SudokuType;
 import imgui.ImGui;
 import imgui.extension.imguifiledialog.ImGuiFileDialog;
 import imgui.extension.imguifiledialog.flag.ImGuiFileDialogFlags;
@@ -16,7 +17,7 @@ import sudoku.structure.SudokuFactory;
 
 public class SudokuSelector {
 
-	public final Signal onSelect = new Signal();
+	public final ConsumerSignal<MultiDoku> onSelect = new ConsumerSignal<>();
 	private MultiDoku doku;
 
 	private final boolean canGenEmptyGrid;
@@ -26,16 +27,16 @@ public class SudokuSelector {
 	private final ImInt difficulty = new ImInt(Difficulty.Medium.ordinal());
 	private final List<ImBoolean> contraints = new ArrayList<>();
 
-	private static final String[] sudokuTypes = { "Carré", "Rectangle", "Multidoku" };
-	private static final int SQUARE = 0, RECTANGLE = 1, MULTIDOKU = 2;
-
 	private final ImInt sudokuSize = new ImInt(3);
 
 	private final ImInt sudokuWidth = new ImInt(3);
 	private final ImInt sudokuHeight = new ImInt(3);
 
-	public SudokuSelector(boolean canGenEmptyGrid) {
+	private final String confirmMessage;
+
+	public SudokuSelector(boolean canGenEmptyGrid, String confirmMessage) {
 		this.canGenEmptyGrid = canGenEmptyGrid;
+		this.confirmMessage = confirmMessage;
 		initConstraints();
 	}
 
@@ -63,7 +64,7 @@ public class SudokuSelector {
 				e.printStackTrace();
 			}
 		}
-		this.onSelect.emit();
+		this.onSelect.emit(this.doku);
 	}
 
 	public void renderFileDialog() {
@@ -75,7 +76,7 @@ public class SudokuSelector {
 						String filePath = entry.getValue();
 						this.doku = SudokuFactory.fromfile(filePath);
 						if (this.doku != null)
-							this.onSelect.emit();
+							this.onSelect.emit(this.doku);
 					} catch (Exception e) {
 						e.printStackTrace();
 					}
@@ -98,7 +99,7 @@ public class SudokuSelector {
 		switch (currentType.getMakerParamCount()) {
 			case 1:
 				ImGui.inputInt("Taille", sudokuSize);
-				if (ImGui.button("Résoudre un sudoku")) {
+				if (ImGui.button(confirmMessage)) {
 					selectSudoku(currentType.createDoku(getConstraints(), sudokuSize.get()), false);
 				}
 				if (canGenEmptyGrid && ImGui.button("Générer une grille vide")) {
@@ -109,7 +110,7 @@ public class SudokuSelector {
 			case 2:
 				ImGui.inputInt("Largeur", sudokuHeight);
 				ImGui.inputInt("Longueur", sudokuWidth);
-				if (ImGui.button("Résoudre un sudoku")) {
+				if (ImGui.button(confirmMessage)) {
 					selectSudoku(currentType.createDoku(getConstraints(), sudokuWidth.get(), sudokuHeight.get()),
 							false);
 				}
@@ -129,8 +130,4 @@ public class SudokuSelector {
 		renderFileDialog();
 	}
 
-	public MultiDoku getDoku() {
-		return doku;
-	}
-
 }

app/src/main/java/gui/widget/TimerRenderer.java

@@ -0,0 +1,29 @@
+package gui.widget;
+
+import java.time.Instant;
+
+import imgui.ImGui;
+
+public class TimerRenderer {
+
+	private final long endTime;
+
+	public TimerRenderer(Instant startTime, int duration) {
+		this.endTime = startTime.getEpochSecond() + duration;
+	}
+
+	private long getTimeRemaining() {
+		long currentTime = Instant.now().getEpochSecond();
+		return endTime - currentTime;
+	}
+
+	public void render() {
+		long seconds = getTimeRemaining();
+		long minutes = seconds / 60;
+		String text = String.format("%02d:%02d", minutes, seconds % 60);
+		var textSize = ImGui.calcTextSize(text);
+		ImGui.setCursorPosX(ImGui.getIO().getDisplaySizeX() / 2.0f - textSize.x / 2.0f);
+		ImGui.text(text);
+	}
+
+}

app/src/main/java/network/ConnexionThread.java

@@ -22,7 +22,7 @@ public class ConnexionThread extends Thread {
 				// System.out.println(objectInputStream.available());
 				Object o = objectInputStream.readObject();
 				if (o instanceof Packet packet) {
-					connexion.visitPacket(packet);
+					connexion.visit(packet);
 				}
 			} catch (ClassNotFoundException | IOException e) {
 				e.printStackTrace();

app/src/main/java/network/client/Client.java

@@ -7,7 +7,11 @@ import java.util.Random;
 import common.Signal;
 import game.Game;
 import game.Player;
+import network.protocol.packets.ChangeCellPacket;
 import network.protocol.packets.LoginPacket;
+import sudoku.structure.Cell;
+import sudoku.structure.MultiDoku;
+import sudoku.structure.Sudoku;
 
 public class Client {
 	private final ClientConnexion clientConnection;
@@ -18,6 +22,8 @@ public class Client {
 	public final Signal onClosed = new Signal();
 	public final Signal onGameStarted = new Signal();
 
+	Player player;
+
 	String disconnectReason = null;
 
 	public Client(String address, short port) throws UnknownHostException, IOException {
@@ -54,4 +60,20 @@ public class Client {
 		stop();
 	}
 
+	public void sendCellChange(Cell cell) {
+		MultiDoku doku = getGame().getDoku();
+		for (int sudokuIndex = 0; sudokuIndex < doku.getNbSubGrids(); sudokuIndex++) {
+			Sudoku sudoku = doku.getSubGrid(sudokuIndex);
+			int cellIndex = sudoku.getCells().indexOf(cell);
+			if (cellIndex != -1) {
+				this.clientConnection.sendPacket(new ChangeCellPacket(sudokuIndex, cellIndex, cell.getSymbolIndex()));
+				return;
+			}
+		}
+	}
+
+	public Player getPlayer() {
+		return player;
+	}
+
 }

app/src/main/java/network/client/ClientConnexion.java

@@ -6,19 +6,21 @@ import java.net.UnknownHostException;
 
 import game.Player;
 import network.Connexion;
+import network.protocol.packets.ChangeCellPacket;
 import network.protocol.packets.ConnexionInfoPacket;
 import network.protocol.packets.DisconnectPacket;
+import network.protocol.packets.EndGamePacket;
 import network.protocol.packets.KeepAlivePacket;
 import network.protocol.packets.LoginPacket;
 import network.protocol.packets.PlayerJoinPacket;
 import network.protocol.packets.PlayerLeavePacket;
 import network.protocol.packets.StartGamePacket;
+import network.protocol.packets.UpdatePlayerScorePacket;
 import sudoku.io.SudokuSerializer;
 
 public class ClientConnexion extends Connexion {
 
 	private final Client client;
-	private Player player = null;
 
 	public ClientConnexion(String address, short port, Client client) throws UnknownHostException, IOException {
 		super(new Socket(address, port));
@@ -35,7 +37,7 @@ public class ClientConnexion extends Connexion {
 
 	@Override
 	public void visitPacket(ConnexionInfoPacket packet) {
-		this.player = this.client.getGame().getPlayerById(packet.getConnectionId());
+		this.client.player = this.client.getGame().getPlayerById(packet.getConnectionId());
 		client.onConnect.emit();
 	}
 
@@ -69,8 +71,27 @@ public class ClientConnexion extends Connexion {
 
 	@Override
 	public void visitPacket(StartGamePacket packet) {
-		this.client.getGame().startGame(SudokuSerializer.deserializeSudoku(packet.getSerializedSudoku()));
+		this.client.getGame().startGame(SudokuSerializer.deserializeSudoku(packet.getSerializedSudoku()),
+				packet.getInstant());
 		this.client.onGameStarted.emit();
 	}
 
+	@Override
+	public void visitPacket(EndGamePacket packet) {
+		// TODO Auto-generated method stub
+		throw new UnsupportedOperationException("Unimplemented method 'visitPacket'");
+	}
+
+	@Override
+	public void visitPacket(UpdatePlayerScorePacket packet) {
+		Player player = this.client.getGame().getPlayerById(packet.getPlayerId());
+		assert (player != null);
+		this.client.getGame().setPlayerScore(player, packet.getCellsLeft());
+	}
+
+	@Override
+	public void visitPacket(ChangeCellPacket packet) {
+		throw new UnsupportedOperationException("Unimplemented method 'visitPacketChangeCell'");
+	}
+
 }

app/src/main/java/network/protocol/PacketVisitor.java

@@ -1,16 +1,19 @@
 package network.protocol;
 
+import network.protocol.packets.ChangeCellPacket;
 import network.protocol.packets.ConnexionInfoPacket;
 import network.protocol.packets.DisconnectPacket;
+import network.protocol.packets.EndGamePacket;
 import network.protocol.packets.KeepAlivePacket;
 import network.protocol.packets.LoginPacket;
 import network.protocol.packets.PlayerJoinPacket;
 import network.protocol.packets.PlayerLeavePacket;
 import network.protocol.packets.StartGamePacket;
+import network.protocol.packets.UpdatePlayerScorePacket;
 
 public interface PacketVisitor {
 
-	default void visitPacket(Packet packet) {
+	default void visit(Packet packet) {
 		packet.accept(this);
 	}
 	
@@ -21,5 +24,8 @@ public interface PacketVisitor {
 	void visitPacket(PlayerJoinPacket packet);
 	void visitPacket(PlayerLeavePacket packet);
 	void visitPacket(StartGamePacket packet);
+	void visitPacket(EndGamePacket packet);
+	void visitPacket(UpdatePlayerScorePacket packet);
+	void visitPacket(ChangeCellPacket packet);
 	
 }

app/src/main/java/network/protocol/Packets.java

@@ -2,6 +2,6 @@ package network.protocol;
 
 public enum Packets {
 
-	ConnectionInfo, KeepAlive, Disconnect, Login, PlayerJoin, PlayerLeave, StartGame
+	ConnectionInfo, KeepAlive, Disconnect, Login, PlayerJoin, PlayerLeave, StartGame, ChangeCell, EndGame, UpdatePlayerScore
 
 }

app/src/main/java/network/protocol/packets/ChangeCellPacket.java

@@ -0,0 +1,38 @@
+package network.protocol.packets;
+
+import network.protocol.Packet;
+import network.protocol.PacketVisitor;
+import network.protocol.Packets;
+
+public class ChangeCellPacket extends Packet {
+
+	static private final long serialVersionUID = Packets.ChangeCell.ordinal();
+
+	private final int sudokuIndex;
+	private final int cellIndex;
+	private final int newValue;
+
+	public ChangeCellPacket(int sudokuIndex, int cellIndex, int newValue) {
+		this.sudokuIndex = sudokuIndex;
+		this.cellIndex = cellIndex;
+		this.newValue = newValue;
+	}
+
+	public int getSudokuIndex() {
+		return sudokuIndex;
+	}
+
+	public int getCellIndex() {
+		return cellIndex;
+	}
+
+	public int getNewValue() {
+		return newValue;
+	}
+
+	@Override
+	public void accept(PacketVisitor packetVisitor) {
+		packetVisitor.visitPacket(this);
+	}
+
+}

app/src/main/java/network/protocol/packets/EndGamePacket.java

@@ -0,0 +1,26 @@
+package network.protocol.packets;
+
+import network.protocol.Packet;
+import network.protocol.PacketVisitor;
+import network.protocol.Packets;
+
+public class EndGamePacket extends Packet {
+
+	static private final long serialVersionUID = Packets.EndGame.ordinal();
+
+	private final int winnerId;
+
+	public EndGamePacket(int winnerId) {
+		this.winnerId = winnerId;
+	}
+
+	public int getWinnerId() {
+		return winnerId;
+	}
+
+	@Override
+	public void accept(PacketVisitor packetVisitor) {
+		packetVisitor.visitPacket(this);
+	}
+
+}

app/src/main/java/network/protocol/packets/StartGamePacket.java

@@ -1,5 +1,7 @@
 package network.protocol.packets;
 
+import java.time.Instant;
+
 import network.protocol.Packet;
 import network.protocol.PacketVisitor;
 import network.protocol.Packets;
@@ -9,15 +11,22 @@ public class StartGamePacket extends Packet {
 	static private final long serialVersionUID = Packets.StartGame.ordinal();
 
 	private final String serializedSudoku;
+	// used to resume game
+	private final Instant instant;
 
-	public StartGamePacket(String serializedSudoku) {
+	public StartGamePacket(String serializedSudoku, Instant instant) {
 		this.serializedSudoku = serializedSudoku;
+		this.instant = instant;
 	}
 
 	public String getSerializedSudoku() {
 		return serializedSudoku;
 	}
 
+	public Instant getInstant() {
+		return instant;
+	}
+
 	@Override
 	public void accept(PacketVisitor packetVisitor) {
 		packetVisitor.visitPacket(this);

app/src/main/java/network/protocol/packets/UpdatePlayerScorePacket.java

@@ -0,0 +1,32 @@
+package network.protocol.packets;
+
+import network.protocol.Packet;
+import network.protocol.PacketVisitor;
+import network.protocol.Packets;
+
+public class UpdatePlayerScorePacket extends Packet {
+
+	static private final long serialVersionUID = Packets.UpdatePlayerScore.ordinal();
+
+	private final int playerId;
+	private final int cellsLeft;
+
+	public UpdatePlayerScorePacket(int playerId, int cellsLeft) {
+		this.playerId = playerId;
+		this.cellsLeft = cellsLeft;
+	}
+
+	public int getPlayerId() {
+		return playerId;
+	}
+
+	public int getCellsLeft() {
+		return cellsLeft;
+	}
+
+	@Override
+	public void accept(PacketVisitor packetVisitor) {
+		packetVisitor.visitPacket(this);
+	}
+
+}

app/src/main/java/network/server/Server.java

@@ -2,6 +2,7 @@ package network.server;
 
 import java.io.IOException;
 import java.net.ServerSocket;
+import java.time.Instant;
 import java.util.ArrayList;
 import java.util.List;
 
@@ -69,8 +70,12 @@ public class Server {
 	}
 
 	public void startGame(MultiDoku doku) {
-		this.game.startGame(doku);
-		broadcastPacket(new StartGamePacket(SudokuSerializer.serializeSudoku(doku).toString()));
+		Instant now = Instant.now();
+		this.game.startGame(doku, now);
+		for (ServerConnexion connexion : this.connexions) {
+			connexion.setSudoku(doku.clone());
+		}
+		broadcastPacket(new StartGamePacket(SudokuSerializer.serializeSudoku(doku).toString(), now));
 	}
 
 }

app/src/main/java/network/server/ServerConnexion.java

@@ -3,17 +3,23 @@ package network.server;
 import java.io.IOException;
 import java.net.Socket;
 
+import game.Game;
 import game.Player;
 import game.Game.GameState;
 import network.Connexion;
+import network.protocol.packets.ChangeCellPacket;
 import network.protocol.packets.ConnexionInfoPacket;
 import network.protocol.packets.DisconnectPacket;
+import network.protocol.packets.EndGamePacket;
 import network.protocol.packets.KeepAlivePacket;
 import network.protocol.packets.LoginPacket;
 import network.protocol.packets.PlayerJoinPacket;
 import network.protocol.packets.PlayerLeavePacket;
 import network.protocol.packets.StartGamePacket;
+import network.protocol.packets.UpdatePlayerScorePacket;
 import sudoku.io.SudokuSerializer;
+import sudoku.structure.Cell;
+import sudoku.structure.MultiDoku;
 
 public class ServerConnexion extends Connexion {
 
@@ -21,6 +27,7 @@ public class ServerConnexion extends Connexion {
 	private final KeepAliveHandler keepAliveHandler;
 	private boolean shouldClose = false;
 	private Player player = null;
+	private MultiDoku doku;
 
 	public ServerConnexion(Socket socket, Server server) throws IOException {
 		super(socket);
@@ -29,7 +36,7 @@ public class ServerConnexion extends Connexion {
 	}
 
 	public boolean update() {
-		if (shouldClose | isClosed())
+		if (shouldClose || isClosed())
 			return false;
 		return this.keepAliveHandler.update();
 	}
@@ -54,13 +61,22 @@ public class ServerConnexion extends Connexion {
 	private void finishLogin() {
 		// send players that have already joined (excluding this one)
 		for (Player p : this.server.getGame().getPlayers().values()) {
-			if (p.getId() != player.getId())
+			if (p.getId() != player.getId()) {
 				sendPacket(new PlayerJoinPacket(p));
+				sendPacket(new UpdatePlayerScorePacket(p.getId(), p.getScore()));
 			}
+		}
+
 		this.server.broadcastPacket(new PlayerJoinPacket(player));
 		sendPacket(new ConnexionInfoPacket(player.getId()));
-		if (this.server.getGame().getGameState() == GameState.GameGoing) {
-			sendPacket(new StartGamePacket(SudokuSerializer.serializeSudoku(this.server.getGame().getDoku()).toString()));
+
+		Game game = this.server.getGame();
+
+		if (game.getGameState() == GameState.GameGoing) {
+			setSudoku(game.getDoku().clone());
+			sendPacket(
+					new StartGamePacket(SudokuSerializer.serializeSudoku(game.getDoku()).toString(),
+							game.getStartTime()));
 		}
 	}
 
@@ -102,4 +118,43 @@ public class ServerConnexion extends Connexion {
 		throw new UnsupportedOperationException("Unimplemented method 'visitPacketStartGame'");
 	}
 
+	@Override
+	public void visitPacket(EndGamePacket packet) {
+		throw new UnsupportedOperationException("Unimplemented method 'visitPacket'");
+	}
+
+	@Override
+	public void visitPacket(UpdatePlayerScorePacket packet) {
+		throw new UnsupportedOperationException("Unimplemented method 'visitPacket'");
+	}
+
+	@Override
+	public void visitPacket(ChangeCellPacket packet) {
+		Cell cell = this.doku.getSubGrid(packet.getSudokuIndex()).getCell(packet.getCellIndex());
+		if (cell.getSymbolIndex() == Cell.NOSYMBOL && packet.getNewValue() == Cell.NOSYMBOL)
+			return;
+		if (cell.getSymbolIndex() != Cell.NOSYMBOL && packet.getNewValue() != Cell.NOSYMBOL) {
+			cell.trySetValue(packet.getNewValue());
+			return;
+		}
+		if (cell.getSymbolIndex() != Cell.NOSYMBOL && packet.getNewValue() == Cell.NOSYMBOL) {
+			cell.empty();
+			this.server.getGame().setPlayerScore(player, player.getScore() + 1);
+			this.server.broadcastPacket(new UpdatePlayerScorePacket(player.getId(), player.getScore()));
+			return;
+		}
+		// on rajoute un chiffre à la grille
+		if (cell.trySetValue(packet.getNewValue())) {
+			this.server.getGame().setPlayerScore(player, player.getScore() - 1);
+			this.server.broadcastPacket(new UpdatePlayerScorePacket(player.getId(), player.getScore()));
+		}
+	}
+
+	public void setSudoku(MultiDoku doku) {
+		this.doku = doku;
+		assert (player != null);
+		this.server.getGame().setPlayerScore(player, this.doku.getEmptyCells().size());
+		this.server.broadcastPacket(new UpdatePlayerScorePacket(player.getId(), player.getScore()));
+	}
+
 }

app/src/main/java/sudoku/structure/Cell.java

@@ -126,6 +126,8 @@ public class Cell {
 	}
 
 	public boolean trySetValue(int newValue) {
+		if (!isMutable())
+			return false;
 		if (!canHaveValue(newValue))
 			return false;
 		setSymbolIndex(newValue);

app/src/main/java/sudoku/structure/MultiDoku.java

@@ -1,6 +1,10 @@
 package sudoku.structure;
 
-import java.util.*;
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Random;
+import java.util.Set;
 
 import sudoku.io.SudokuSerializer;
 
@@ -178,4 +182,9 @@ public class MultiDoku {
 		int randomIndex = rand.nextInt(emptyCells.size());
 		return emptyCells.get(randomIndex);
 	}
+
+	public MultiDoku clone() {
+		//TODO: aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaah
+		return SudokuSerializer.deserializeSudoku(SudokuSerializer.serializeSudoku(this));
+	}
 }